Thermo Scientific 1160, Instruction Manual

Page: 41 / 52

STEP 10 . Insert the 5/32” Allen wrench
into the access hole in the compres-
sor housing. Loosen the set screw 1/4
turn. Rotate connecting rod to top dead
center (180°) and slide the connecting
rod/eccentric assembly off the shaft and
through the opening in the housing.
Eccentric
Set Screw
Access
Hole
Eccentric
Set Screw
Figure 5
STEP 11. Secure the rod assembly in a fixture.
Remove the sleeve (1 - discard) from the
connecting rod. Remove the screw (2 - compare
to screws from kit) from the cup retainer (3 -
retain for reassembly). Remove the piston cup
(4 - compare to cups from kit) and wipe debris
from the top of the connecting rod and retainer
with a clean damp cloth.
(2* This retainer screw may be one of two
different sizes depending on when it was
manufactured. Both of the different screw sizes
are supplied in this kit. Compare the screw and
piston cup you removed with the 2 screws and
piston cups from the kit to determine which one
to use in this repair. Discard unneed parts.)
STEP 12 . Carefully place new sleeve (1) over
connecting rod top. Place new cup (4) in center
of connecting rod top. Do not damage the cup.
Place retainer (3) on top of cup (counterbore
up), making sure that the cup inside diameter
is seated properly over retaining boss. Note
that the retainer has a locating boss that must
insert into rod top pilot. Drive new retainer screw
to 100 in-lbs. Carefully push sleeve up forming
the cup. Stop pushing the cylinder sleeve up
when the piston cup is positioned midway inside
the sleeve.
1
4
3
2*
Figure 6
B-5